There's truth in this. Generally, I search for part numbers on google or rockauto, and then you can find them on amazon. The UX for finding parts that fit your car on amazon is either confusing or broken, I'm not sure which.
Re:Amazon’s Twitch Acquisition Is Official
by jethro_tell on Tuesday August 26, 2014 @09:42AM
(#8226994)
Both. This may because of the existing parts distribution system already in place. It doesn't see to be a place they have been putting much effort into. There wasn't even auto part search until recently.
I buy tons of wierd automotive parts that are not 'well known' and usually end up using Google to find products on Amazon.
Their search engine is actually pretty limiting in some ways.